Offres CDD


Renoir
Préparation du suivi des performances de l'instrument NISP avant et pendant la recette en vol de la mission spatiale Euclid.
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Responsable :
S. Kermiche / S. Escoffier - kermiche@cppm.in2p3.fr
Description :

\textbf{Description})

Le Centre de Physique des particules de Marseille (CPPM) ouvre un conntrat à durée déterminée (CDD) pour travailler dans la préparation de la phase de recette en vol de l'instrument NISP de la mission spatiale Euclid.


La mission Euclid, projet international de l'Agence Spatiale Européenne (ESA) dont le lancement est prévu en 2023, a pour ambition de comprendre la nature de la matière noire et de l'énergie sombre qui composent 95% de notre Univers. Pour cela, Euclid va mesurer la forme et la position de plusieurs dizaines de millions de galaxies grâce à deux instruments, un imageur dans le domaine visible, l'instrument VIS, et un spectrophotomètre dans le domaine du proche infrarouge, l'instrument NISP.


L'équipe du CPPM est fortement impliquée dans le projet Euclid, et a la responsabilité scientifique du NISP, partie spectroscopie. L'équipe travaille sur les codes d'analyses des données au sol et en vol du NISP ainsi que sur la calibration de l'instrument. Le CPPM est aussi un acteur majeur dans la caractérisation des détecteurs infrarouges de l'instrument, et une partie de l'équipe travaille sur les développements de codes de simulation du NISP pour la spectroscopique.


La personne recrutée sur ce poste s'intégrera dans cette équipe d'experts de l'instrument NISP. Elle aura en charge la vérification des performances de l'instrument NISP et son suivi durant la phase de recette en vol de l'instrument qui suivra le lancement du satellite. Il s'agira d'être un support à l'Instrument Scientist de l'instrument NISP, scientifique basé au CPPM. Cette activité inclut la préparation des codes d'analyse des données vol et la validation des procédures de calibration et des séquences de vérification des performances de l'instrument.


Le contrat est à pourvoir dès que possible, pour une durée de 1 an, avec une extension possible jusqu'à 2 ans.


\textbf{Compétences})

La personne qui candidate à ce poste doit avoir :

\textbf{Savoirs}):

• Un diplôme de doctorat en Physique, Astrophysique ou un diplome d'ingénieur.

• Connaissances approfondies en génie logiciel

• Connaissances approfondies en traitement de signal, traitement d'image et caractérisation statistique

\textbf{Savoir-faire}):

• Analyse et modélisation de données scientifiques

• Maitrise des langages de programmation C/C++/Python

• Connaissance du système d'exploitation Linux/Unix et des machines virtuelles

• Langue anglaise : niveau C2 ou C1 (cadre européen commun de référence pour les langues)

• Rédaction des rapports techniques en anglais

\textbf{Savoir être}):

• Capacité à travailler en équipe et au sein d'une grande collaboration internationale.


Une expertise dans les domaines de l'instrumentation, du spatial, ou de la réduction de données en astronomie/cosmologie sera un plus.

Possibilité de joindre des lettres de recommandation à votre candidature.


\textbf{Contact})

Les candidatures devront contenir une lettre de motivation et un CV à adresser à :

• Stéphanie Escoffier (escoffier@cppm.in2p3.fr )

• Smaïn Kermiche (kermiche@cppm.in2p3.fr )


Mots clefs :
Cosmologie observationnelle
Code :
CDD-2223-RE-01

Offres PostDoc


Atlas
Contrat postdoctoral dans le groupe ATLAS CPPM
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Responsable :
Thomas Strebler - +33 4 91 82 72 52 - strebler@cppm.in2p3.fr
Description :

Le groupe ATLAS au CPPM Marseille invite les candidatures à un poste de CDD chercheur post-doctoral au sein du groupe. Le contrat de 24 mois, basé à Marseille, offre un salaire compétitif (2.8k€ - 3.3k€, brut mensuel) et est financé par le projet ANR DIVE.


L'étude de la production d'une paire de bosons de Higgs génère un intérêt grandissant dans la communauté de la physique des particules. En plus de l'auto-couplage du Higgs, le couplage VVHH est également un paramètre important pour améliorer notre compréhension de la brisure de symétrie électrofaible, qui peut être sondé au travers de la recherche d'événements di-Higgs dans le mode de production VBF. Des contraintes très fortes sur ce couplage peuvent d'ores et déjà être obtenues avec les données du Run 3 du LHC, en particulier en combinant des régions de basse et haute m(HH). Afin de garantir une bonne sensibilité dans le régime à haute m(HH), des algorithmes d'identification spécialisés ciblant les désintégrations de bosons de Higgs boostés sont essentiels.


Le?la candidat?e sélectionné?e travaillera en collaboration avec d'autres membres des groupes ATLAS du CPPM, IJCLab et LPNHE afin de mettre en place la première analyse ATLAS contraignant le couplage VVHH dans l'état final bbtautau. Le?la candidat?e devra jouer un rôle moteur dans les activités d'analyse ainsi que dans le développement d'algorithmes innovants d'identification de désintégration boostée H->tautau. Une expérience en matière de simulation Monte Carlo, de performance objet et d'analyse de données et attendue, ainsi que des compétences en termes de programmation et travail d'équipe et une propension aux déplacements professionnels.


Les candidat?e?s doivent détenir un doctorat en physique depuis moins de deux ans à la date de démarrage du contrat, prévue au 1er avril 2023, et avoir une expérience de recherche en physique des particules élémentaires. Les candidat?e?s sont invité?e?s à soumettre leur candidature sur :

https://emploi.cnrs.fr/Offres/CDD/UMR7346-ANNPOR-097/Default.aspx

avec leur CV, une liste de publications majeures et un résumé de leurs intérêts de recherche. Au moins deux lettres de recommendation devront être adressées à Thomas Strebler (strebler@cppm.in2p3.fr, petit@cppm.in2p3.fr). Une prise de contact informelle est bienvenue auprès de ces mêmes contacts.


Mots clefs :
Physique des particules
Code :
PostDoc-2223-AT-01
KM3NeT
Postdoc on astroparticle physics and astronomy at IPhU, Aix-Marseille University
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Responsable :
Damien Dornic - 04 91 82 76 82 - dornic@cppm.in2p3.fr
Description :

The Institute for Physics of the Universe (IPhU, Aix-Marseille University) invites applications

for a young postdoc position (<2 years of experience) in the field of astroparticle physics and astronomy. She/he will be part of the A*MIDEX interdisciplinarity project NEXCOS (NEutrinos and X-ray follow-up for Cosmic-ray Source studies) to study cosmic neutrinos detected with the KM3NeT detector from active galactic nuclei (AGN).


Many hints on the association between high-energy neutrinos and bright active galactic nuclei (blazars and Seyfert galaxies) have been discovered by IceCube and ANTARES neutrino telescopes. All these nice results indicate that we are reaching the top of the iceberg of the individual source detection. Thanks to the unprecedented angular resolution, the extended energy range (GeV – >10 PeV) and the full sky coverage, KM3NeT will play an important role in the rapidly evolving multi-messenger field. End 2022, 15/21 detection units are in operation at the ORCA/ARCA site. At the end of 2023, the size of both detectors will more or less double. A good sensitivity over such a large energy coverage can be obtained by combining the data of the two detectors (ORCA-France and ARCA-Italy). KM3NeT will achieve a directional precision of <0.1 degrees for the muon neutrino tracks at very high energies, and <1.5º for the cascade events (from electron neutrino, tau neutrino charged current + all flavor neutrino neutral current interactions). With KM3NeT, we will be able to perform a very efficient all-flavour neutrino astronomy. Real-time multi-messenger campaigns are crucial in unveiling the sources of the most energetic particles and the acceleration mechanisms at work in active galactic nuclei. Neutrinos would provide insights into the physics of particle acceleration processes in relativistic jets and disc-corona systems. It relies on the quasi-online communication of potentially interesting observations to partner instruments (“alerts”), with latencies of a few minutes, at most. Such alerts are the only way to achieve simultaneous observations of transient phenomena by pointing instruments.


Among the neutrino group at CPPM, and in collaboration with LAM, the postdoc researcher will first have to develop efficient all-flavor cosmic neutrino event selections that identify a small number of interesting neutrinos from the bulk of atmospheric neutrinos and muons. Those selections will then be implemented in the real-time analysis framework of KM3NeT. Each selected event will trigger an alert sent publicly to the astronomer community. Then, the postdoc will participate to the organisation of the multi-wavelength electromagnetic follow-up, in particular with X-ray (Swift, SVOM, XMM-Newton, Chandra or NuSTAR) and optical (COLIBRI) observations. In this task, we expect that the postdoc takes a leading role in the follow-up with the SVOM mission. Finally, based on the spectral energy distribution, we expect to fit the data with the up-to-date hadronic models and derive constrains on the microphysics of the sources.


IPhU is a leading collaborative scientific research and education environment dedicated to the Physics of the Universe and associated technologies: from the infinitely small scales of particle physics, to the infinitely large ones of cosmology, with high-energy astrophysics in between. It brings together and synergizes the theoretical, observational and experimental skills of three laboratories in Marseille, internationally recognized in those fields. The postdoc will join the Centre de Physique des Particules de Marseille (CPPM) and the Laboratoire d'Astrophysique de Marseille (LAM), which are both part of IPhU. She/he will be located at CPPM. The postdoc will work under the supervision of Damien Dornic (CPPM) and Delphine Porquet (LAM). The neutrino group of CPPM has a leading role in the construction and exploitation of ANTARES and KM3NeT for more than 20 years.


The position is expected to start between April and July 2023, the exact starting date can be discussed. It will be funded for two years with a net monthly salary of about 2050-2300 euros (gross monthly salary of about 2550-2850 euros).


The applicants are expected to hold a PhD degree in high energy physics/astrophysics, at the time of the beginning of the postdoc contract. The candidate should have a strong interest in astroparticle physics and a good knowledge of high-energy astrophysics/physics data analysis. Expertise in AGN modelisation is a plus. Good practical skills in python and C++, and good knowledge of open software development environment (git, etc) will be an important asset. Ability to work in international teams and in large collaborations are highly recommended.


REQUESTED DOCUMENTS OF APPLICATION, SELECTION PROCESS [DEADLINE: April 1st, 2023]

o A motivation letter,

o Two reference letters (to be sent directly to dornic@cppm.in2p3.fr and delphine.porquet@lam.fr),

o CV and University grade transcripts (for all degrees)


WHERE TO APPLY

dornic@cppm.in2p3.fr \& delphine.porquet@lam.fr


Mots clefs :
Astroparticules
Code :
PostDoc-2223-KM-01
Multi-messenger analyses with KM3NeT, SVOM and COLIBRI telescopes.
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Responsable :
Damien Dornic - +33491827682 - dornic@cppm.in2p3.fr
Description :

The CNRS/IN2P3 is offering a young postdoctoral position (<3 years of experience) with a contract 2 years in the field of astroparticle physics and neutrino astronomy. The postdoc will join the Centre de Physique des Particules de Marseille (CPPM). She/he will participate to the KM3NeT, SVOM and COLIBRI Collaborations.

Neutrinos are unique messengers to study the high-energy Universe as they are neutral and stable, interact weakly and therefore travel directly from their point of creation to the Earth without absorption and path deviation. Many hints on the association between high-energy neutrinos and bright astrophysical sources (active galaxy nuclei, tidal disruption events, etc.) have been discovered by the IceCube and ANTARES neutrino telescopes. All these nice results indicate that we are now reaching the top of the iceberg of the individual source detection. Thanks to its unprecedented angular resolution, the extended energy range (10 MeV ? 10 PeV) and the full sky coverage, the new generation neutrino telescope KM3NeT will play an important role in the rapidly evolving multi-messenger field. End 2022, 15/21 detection units of KM3NeT are in operation at the ORCA/ARCA site. At the end of 2023, the size of both detectors will more or less double. A good sensitivity over such a large neutrino energy range can be obtained by combining the data of the two KM3NeT detectors (ORCA-France and ARCA-Italy). KM3NeT will achieve a directional precision of <0.1º for the muon neutrino tracks at very high energies, and <1.5º for the cascade events (from electron neutrino, tau neutrino charged current + all flavour neutrino neutral current interactions). With KM3NeT, we will be able to perform a very efficient all-flavour neutrino astronomy. Real-time multi-messenger campaigns are crucial in unveiling the sources of the most energetic particles and the acceleration mechanisms at work in active galactic nuclei. Neutrinos would provide insights into the physics of particle acceleration processes in relativistic jets and disc-corona systems. It relies on the quasi-online communication of potentially interesting observations to partner instruments (“alerts”), with latencies of a few minutes, at most. Such alerts are the only way to achieve simultaneous observations of transient phenomena by pointing instruments.

SVOM is a Franco-Chinese space mission (launch date scheduled end of 2023) to study the multi-wavelength emission of the most intense phenomena in the Universe and to assure the follow-up of the most interesting multi-messenger and multi-wavelength alerts. SVOM contains 2 large field of view instruments (ECLAIRs and GRM) and 2 narrow field instruments (MXT and VT). The particularity of this mission is that there is a very complex ground segment that contains several optical robotic telescopes. Among them, COLIBRI is a French-Mexican 1.3m robotic telescope equipped with 3 optical and NIR channels.


The neutrino group of CPPM is having a leading role in the construction and exploitation of the ANTARES and KM3NeT neutrino telescopes for more than 20 years. Among the neutrino group at CPPM, the postdoc researcher will mainly work in the online analysis platform of KM3NeT to put in place the neutrino alerts and the search for time/space correlation with external multi-messenger and multi-wavelength triggers. To do so, she/he will develop efficient all-flavor cosmic neutrino event selections that identify a small number of interesting neutrino events from the bulk of atmospheric neutrinos and muons. Those selections will then be implemented in the real-time analysis framework of KM3NeT. Each selected event will trigger an alert sent publicly to the astronomer community.


The postdoc will also participate to the organisation and the data reduction of the multi-wavelength electromagnetic follow-up observations performed with the SVOM and the COLIBRI telescopes. She/he will participate to the development of the image analysis pipelines that are used to perform the data reduction of the COLIBRI images and to look for the optical counterpart of the transients discovered by SVOM or any multi-messenger alerts. She/he will also participate to the target of opportunity program to trigger the SVOM MXT and VT instruments. As a member of the KM3NeT and SVOM collaborations, the postdoc will have to participate to the different shifts and service tasks of these different facilities.


The applicant should have a PhD at the start of the contract and a good background in astroparticle physics and astrophysics. Interest in the data analysis is expected together with knowledge of statistics. Good practical skills in python, C++ and Root, and good knowledge of open software development environment (git, etc) will be an important asset. Ability to work in international teams and in large collaborations are highly recommended.

The postdoctoral position is expected to start September 1st, 2023, the exact starting date can be discussed. It will be funded for two years with a net monthly salary of about 2320-2670 euros (gross monthly salary of about 2890-3320 euros).

The deadline for application is June 1st 2023. The applicant should provide:

o A motivation letter that states the research interests or a research proposal

o Curriculum vitae and University grade transcripts (for all degrees)

o Two reference letters to be sent directly to dornic@cppm.in2p3.fr and bertin@cppm.in2p3.fr


Mots clefs :
Astroparticules
Code :
PostDoc-2223-KM-02
Renoir
Postdoctoral Research Position in Cosmology
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Responsable :
Stéphanie ESCOFFIER - 04 91 82 76 64 - escoffier@cppm.in2p3.fr
Description :

The Centre de Physique des Particules de Marseille (CPPM) invites applications for a two-year postdoctoral research position in cosmology. The position is dedicated to research related to the Dark Energy Spectroscopy Instrument (DESI) survey. The CPPM cosmology team is involved in future experiments such as DESI, Euclid, Vera Rubin/LSST, and the LISA experiment.


DESI is a ground-based experiment at the Kitt Peak National Observatory Mayall 4m telescope. Starting observations in 2021, DESI will conduct a five-year survey designed to cover 14,000 deg2 and to map the large-scale structure of the Universe by measuring 30 million redshifts. DESI will perform stringent cosmological tests and will allow definitive tests of gravitational physics by constructing a unique redshift-space (3D) map of the large-scale structure of the Universe.


The research areas include the study of large-scale structure of the Universe, with particular emphasis on galaxy clustering or cosmic voids. Candidates with experience in cross-correlation analysis or cosmological probes combination using Cosmic Microwave Background or gravitational lensing are strongly encouraged to apply. The applicant should have a Ph. D. in astronomy/astrophysics/high energy physics, with expertise in (but not limited to): galaxy clustering; theoretical cosmology; gravitational lensing; and observational analysis of large datasets.


Interested candidates are asked to submit a CV, a research statement and a list of publications into a single pdf file to Dr. Stephanie Escoffier, escoffier@cppm.in2p3.fr. Applicants should also arrange for three letters of recommendation to be sent directly to Dr. Stephanie Escoffier. For full consideration, the application and recommendation letters must be received before February 8th, 2021. The position is expected to begin in Oct. 2021.


For further information please contact Dr. Stephanie Escoffier escoffier@cppm.in2p3.fr.


Included Benefits:

French national medical insurance, maternity/paternity leave, lunch subsidies, family supplement for children, participation to public transport fees, pension contributions.

Note that school is free in France for all children above 3.

In addition, CNRS offers free French lessons.


Mots clefs :
Cosmologie observationnelle
Code :
PostDoc-2021-RE-01
Deux postdoctorats en cosmologie observationnelle
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Responsable :
Julian Bautista - bautista@cppm.in2p3.fr
Description :

The Aix-Marseille Initiative of Excellence of the A*Midex university foundation is funding two postdoctoral positions at the Centre de Physique de Particules de Marseille (CPPM) for a duration of two years (+ one year extension possible) in the topic of observational cosmology. These positions are funded in the context of the DARKUNI project (P.I. Julian Bautista) which overall goal is to learn about the dark sector of the Universe from observations of the large-scale structures. In particular, we aim to measure the growth-rate of structures from a joint analysis of redshift-space distortions and peculiar velocities. The CPPM is active member of spectroscopic surveys DESI and Euclid and photometric surveys ZTF and Rubin-LSST.


We welcome applications of highly skilled candidates with experience in cosmology, scientific computing, statistics and data analysis. Experience with data from spectro/photometric surveys and galaxy clustering is highly recommended. We value candidates with good communication skills, willing to work as a team and in the context of large scientific collaborations. Candidates should have a PhD degree at the time of the start of the contract.


The first selected candidate is expected to spend at least 50% of their research time on the data analysis of DESI and/or ZTF surveys. The second selected candidate is expected to spend at least 50% of their research time on the data analysis preparation of Euclid spectroscopic data.


The candidates should send to bautista@cppm.in2p3.fr the following items :


- CV


- Research statement (3 to 5 pages)


- List of publications


- Two reference letters to be sent directly by the recommenders


Application deadline: 31 October 2021


Included Benefits: French national medical/dental insurance, maternity/paternity leave, lunch subsidies, family supplement for children, participation to public transport fees, pension contributions. School is free in France for all children above 3. French lessons are also offered by the institution.


Mots clefs :
Cosmologie observationnelle
Code :
PostDoc-2122-RE-01
imXgam
Postdoctoral Research position on learning methods for hadrontherapy in imXgam
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Responsable :
Yannick Boursier - 04 91 82 76 41 - boursier@cppm.in2p3.fr
Description :

Contract Period : 24 months

Expected date of employment : September 2021

Proportion of work : Full time

Remuneration : Between 2728 et 3145 euros according to experience

Desired level of education : PhD

Experience required : Indifferent


Missions


The research work is part of the TIARA project, which aims to provide an instrumental, methodological proof of concept on real data of the real time monitoring of the emission distribution of Gamma Prompts (GPs) in the context of hadrontherapy. A detection system placed around the patient - composed of an hodoscope and gamma detectors with a temporal resolution of 100 ps - provides time of flight measurements of the particles involved in the treatment. The first objective of the proposed mission is to exploit these data to be able to detect as soon as possible a significant divergence between the real treatment and the treatment plan (simulated upstream), and to stop the treatment if necessary. The final goal is to be able to estimate the distribution of GPs' vertices with a sufficient accuracy to adjust the treatment in real time with respect to the treatment plan. Access to this type of information could also pave the way for measuring the actual dose distribution delivered.


Activities


He/she will develop a research activity at the interface between data sciences and medical physics in order to explore applications of artificial intelligence for time-of-flight data in hadrontherapy. He/she will pursue the following main objectives: i) to improve our approach to 3D GPs vertex reconstruction based on an optimization problem that incorporates the physics of hadrontherapy (e.g. by analyzing simulated and real available data in order to incorporate suitable regularizations like low-rank+sparse). The results obtained at this stage will allow in particular to optimize the design of the instrument for a maximum spatial resolution; ii) to evaluate the contribution of machine learning and deep learning methods to jointly estimate the 3D distribution of GP vertices and the anatomical changes (i.e. of electron density) between the time of the treatment plan and the time of the actual treatment. This essential quantity is often estimated beforehand with significant uncertainties that must be compensated. Different strategies will be studied (transfer learning, use of Generative Adversarial Networks) and the most relevant ones will be evaluated on real data with the feedback of physicians and radiophysicists.


Skills


The candidate should have operational skills in data science, optimization methods and/or machine or deep learning.

Interest in applications in the medical field will be appreciated. Knowledge of the context and/or science of medical physics, specifically radio/hadron therapy will be appreciated.

Ability to work in an interdisciplinary environment.


Work Context


The researcher will be part of the TIARA project (Time-of-flight Imaging ARrAy for real-time monitoring in hadrontherapy) financed by the Inserm Cancer Plan, PCSI 2020 (Physics, Chemistry or Engineering Sciences applied to Cancer), a tripartite collaboration between the Laboratoire de Physique Subatomique \\& Cosmologie (LPSC) in Grenoble, the Centre de Physique des Particules de Marseille (CPPM) and the Centre Antoine Lacassagne (CAL) in Nice. In this project, the CPPM is responsible for the development of the data processing methodology.

He/she will benefit from the multidisciplinary, rich and stimulating work environment of the imXgam team, the CPPM and the Luminy Campus, including access to the know-how and computing facilities of the IN2P3 Computing Center.


Constraints and risks


The research work will be done in close collaboration with the LPSC team specialized in hadrontherapy physics and will require 1-2 days working visits at LPSC, Grenoble and CAL, Nice.

Additional Information


For more information, contact Yannick Boursier (boursier@cppm.in2p3.fr).


Application here : https://bit.ly/36n0skG


Mots clefs :
Imagerie médicale
Code :
PostDoc-2021-IM-02

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